Intangible Assets and Goodwill

12 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets consist of the following (amounts in thousands):



	March 31, 2017
	Gross Amount		Accumulated Amortization			Net Amount
Core and developed technology	$	1,932,329	$	(419,468	)	$	1,512,861
Customer-related	716,945		(123,616		)	593,329
Trademarks and trade names	11,700		(9,636		)	2,064
In-process research and development	38,511		—			38,511
Distribution rights	5,578		(5,346		)	232
Other	1,449		(354		)	1,095
Total	$	2,706,512	$	(558,420	)	$	2,148,092



	March 31, 2016
	Gross Amount		Accumulated Amortization			Net Amount
Core and developed technology	$	724,883	$	(255,460	)	$	469,423
Customer-related	278,542		(200,331		)	78,211
Trademarks and trade names	11,700		(7,571		)	4,129
In-process technology research and development	54,308		—			54,308
Distribution rights	5,580		(5,302		)	278
Total	$	1,075,013	$	(468,664	)	$	606,349

The Company amortizes intangible assets over their expected useful lives, which range between 1 and 15 years. During the year ended March 31, 2017, as a result of the acquisition of Atmel, the Company acquired $1,215.7 million of core and developed technology which has a weighted average amortization period of 11 years, $630.6 million of customer-related intangible assets which have a weighted average amortization period of 6 years, $40.3 million of intangible assets related to backlog with an amortization period of 1 year and $1.8 million of other intangible assets which have a weighted average amortization period of 5 years. In fiscal 2017, $156.7 million of in-process research and development intangible assets reached technological feasibility and was reclassified as core and developed technology and began being amortized over the respective estimated useful lives. The following is an expected amortization schedule for the intangible assets for fiscal 2018 through fiscal 2022, absent any future acquisitions or impairment charges (amounts in thousands):



Fiscal Year Ending March 31,	Projected Amortization Expense
2018	$490,382
2019	361,988
2020	313,288
2021	256,930
2022	189,881

Amortization expense attributed to intangible assets was $346.3 million, $179.3 million and $181.0 million for fiscal years 2017, 2016 and 2015, respectively. In fiscal 2017, $4.0 million was charged to cost of sales and $342.3 million was charged to operating expenses. In fiscal 2016, $3.6 million was charged to cost of sales and $175.7 million was charged to operating expenses. In fiscal 2015, $3.8 million was charged to cost of sales and $177.2 million was charged to operating expenses. During fiscal 2017, the Company recognized $11.9 million of intangible asset impairment changes, primarily as a result of the acquisition of Atmel. The impairment losses were recognized as a result of changes in the combined product roadmaps after the acquisition of Atmel that affected the use and life of these assets. The Company recognized impairment charges of $0.6 million and $1.9 million in fiscal 2016 and fiscal 2015, respectively.

Goodwill activity for fiscal 2017 and fiscal 2016 was as follows (amounts in thousands):



	Semiconductor Products Reporting Unit			Technology Licensing Reporting Unit
Balance at March 31, 2015	$	552,071		$	19,200
Additions due to the acquisition of Micrel	440,992			—
Adjustments due to the acquisition of ISSC	389			—
Balance at March 31, 2016	993,452			19,200
Additions due to the acquisition of Atmel	1,286,371			—
Adjustments due to the acquisition of Micrel	(14		)	—
Balance at March 31, 2017	$	2,279,809		$	19,200

At March 31, 2017, the Company applied a qualitative goodwill impairment test to its two reporting units, concluding it was not more likely than not that goodwill was impaired. Through March 31, 2017, the Company has never recorded an impairment charge against its goodwill balance.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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